Mason County
Michigan — Natural Disaster Risk Assessment
Very LowComposite Risk Score
National percentile: 25th
Mason County faces very low composite natural disaster risk (NRI Risk Index score 25.3, 25th national percentile), driven primarily by winter weather and landslide exposure. Expected annual loss across all 18 hazard types is $7M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Winter Weather | High | 28.67 / yr | $459K |
| Landslide | Very Low | 0.13 / yr | $2K |
| Strong Wind | Medium | 1.08 / yr | $540K |
| Riverine Flood | Low | 0.39 / yr | $4M |
| Cold Wave | Low | 0.89 / yr | $540K |
| Wildfire | Very Low | 0.00 / yr | $22K |
| Heat Wave | Very Low | 1.47 / yr | $131K |
| Coastal Flood | Very Low | 0.01 / yr | $5K |
| Lightning | Low | 28.80 / yr | $89K |
| Ice Storm | Low | 0.34 / yr | $22K |
| Tornado | Very Low | 0.15 / yr | $283K |
| Earthquake | Very Low | 0.00 / yr | $29K |
| Hail | Very Low | 0.76 / yr | $58K |
| Hurricane | Very Low | 0.01 / yr | $3K |
| Avalanche | Very Low | 0.00 / yr | $0 |
| Drought | Very Low | 0.00 / yr | $0 |
| Tsunami | Very Low | 0.00 / yr | $0 |
| Volcanic Activity | Very Low | 0.00 / yr | $0 |
Frequently Asked Questions
What is the overall natural disaster risk for Mason County?
Mason County has a composite FEMA National Risk Index score of 25.3 out of 100, placing it in the Very Low category and the 25th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Mason County?
The three highest-rated hazards are Winter Weather (High, $459K EAL), Landslide (Very Low, $2K EAL), Strong Wind (Medium, $540K EAL). These account for most of the county's expected annual losses.
How does Mason County compare to other Michigan counties?
Mason County ranks #62 of 83 Michigan counties for overall natural disaster risk, with a very low rating.
What does Expected Annual Loss (EAL) mean?
EAL is FEMA's estimate of average annual dollar losses from natural hazards, calculated from historical event data and exposure models. Mason County's $7M EAL is a statistical average, not a guarantee for any specific year or address.